Imaging apparatus, control method, and non-transitory storage medium

Abstract

According to an aspect of the invention, an imaging apparatus includes: a read unit configured to perform a first driving that reads image signals from each of photoelectric conversion units and a second driving that simultaneously reads image signals from the photoelectric conversion units, the photoelectric conversion units receiving light that passes through pupil regions having different imaging optical systems; a compensating unit configured to perform a process of compensating a first linearity based on the image signals obtained by the first driving and a second linearity based on the image signals obtained by the second driving, each of the first and second linearities being a relation between an amount of light incident to the photoelectric conversion unit and a brightness of the image signals read by the reading unit; and a generating unit configured to generate an image signal for recording by adding the image signals compensated the first linearity by the compensating unit.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to an imaging apparatus, a control method, and a storage medium.Description of the Related Art[0002]Japanese Patent Application Laid-Open No. 2001-124984 discloses an imaging apparatus that includes an imaging element having a pixel unit in which a plurality of photoelectric conversion units is arranged for a microlens, and reads image signals in a state in which an exit pupil of an imaging optical system is split. Hereinafter, splitting the exit pupil and reading the image signals is referred to as “split-read”.[0003]Due to the properties of an electric element such as a transistor configuring a read circuit of the imaging element, an electric signal proportional to the brightness of an object image is not obtained in some cases. Hence, in terms of image signals, a linearity of brightness and color is lost. Additionally, in the imaging apparatus that includes the imaging element having the pixel un...

AI Technical Summary

Benefits of technology

The apparatus effectively compensates for signal non-linearity, ensuring high-quality image output by accurately determining compensation values and improving image signal linearity, thereby enhancing image quality.

Problems solved by technology

Additionally, in the imaging apparatus that includes the imaging element having the pixel unit in which the photoelectric conversion units are arranged for the microlens and splits the exit pupil and reads image signals, generating a recording image signal by adding a split-read image may cause the problem below.

Accordingly, it is impossible to correctly determine a compensation value even in attempting the compensation of the linearity after the split-read image signal is added.

As a result, a high quality image cannot be obtained if the image signals to be output are viewed as one frame-image.

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